Set the Caller ID "tag" on peers even if remote party information is present.

Set the Caller ID "tag" on peers even if remote party information is present.

On incoming calls, we were setting the cid_tag on the dialog only if there was
no remote party information (Remote-Party-ID or P-Asserted-Identity) present.
The Caller ID tag is an invented parameter, though, and should be set no matter
the circumstance.

(closes issue ASTERISK-19859)
Reported by Thomas Arimont
(closes issue AST-884)
Reported by Trey Blancher

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@368807 65c4cc65-6c06-0410-ace0-fbb531ad65f3